Strap wrench.



P. IMNAHAI'Ix STRAP WRENCH.

APPLICATION FILED IAN. I0, 1915. Ly Patented Feb. 1S, 191i).

@wide lnarran saar-as raranr onirica PETER MONAHAN, OF PATERSON, NEW JERSEY, ASSIGNOR TO HARRY R. SINCLAIR, OF i WORCESTER, MASSACHUSETTS. y

STRAP WRENCH.

- Specification of Letters Patent.

Patented Feb. 18, 1919.

Appucation mea January `1o, '1916. seriai No. 71,287.

T 0 all whom t may concern:

Be it known that I, PETER MONAHAN, a citizen of the United States, residing at Paterson, county of Passaic, State of New Jersey, have invented an Improvement in Strap Wrenches, of which the following description, in connection with the acco1npa nying drawing, is a specification, like characters on the drawing representing' like parts.

This invention relates to strap wrenches and has for its object 'to provide la novel construction by which the life of the strap can be lengthened.

In using a strap wrench, the wear on the strap where it encircles the pipe and has the gripping engagement with the nose of the wrench all comes on one portion of the strap, and as a result, the strap becomes so worn at this point after a comparatively short term of use that it is liable to break.

I have provided herein a construction wherein the strap may be shifted relative to the handle so that the wear will come on different portions of the strap. With my invention, therefore, the strap may be used in one position until it begins to wear, and then its position may be shifted so that the wear will come on another unworn spot of the strap, and when the strap begins to show signs of wear again its position maybe still further shifted relative to the handle, thus bringing a fresh, unworn spot into use. With my invention it is possible to use a strap much longer than can be done where the position of the strap cannot be shifted relative to the handle.

In order to give an understanding of my invention I have illustrated in the drawings a selected embodiment thereof which will new be described after which the novel features will be pointed out in the appended claim.

In the drawings, Figure l is a side view of a wrench embodying my invention;

Fig. .2 is asection on the line m-ae, Fig. 1, looking in the direction of arrow y.

1 indicates the handle or body portion of a strap wrench, and 2 is the strap element which is adapted to encircle and grip the pipe. Inthe construction herein shown, one end of the strap 2 is fastened to a U- shaped shackle or clip 4 which is pivotally connected to the handle 1, this being aecomplished by looping the end of the strap about the shackle, as shown at 5, and then sewing or otherwise fastening the end (3 of the loop to the body of the strap.

The handle l is provided at its end with the gripping or biting nose 8 which is formed with the convexed strap-engaging surface 9. In using the device the strap 2 is passed about the pipe 3 which is to be turned or gripped, and the end 7 of the strap is inserted between the nose 8 and the body of the strap and then inserted through the U-shapcd shackle i4, as shown in. Fig. 1, the strap being drawn up tightly about the pipe 3. When the strap is thus arranged and the handle l is moved downwardly Fig. l, the portion 10 of the strap will be firmly gripped between the nose 8 and the body portion of the strap and the strap will be tightened about the pipe 3, thus causing the strap to grip the pipe sufficiently so as to turn the latter.

The device as thus far described is one which is more or less commonly used and is not novel with me. In using a strap wrench of this type the greatest strain comes on the portion of the strap which is acted upon by the nose 8, and both plies of the strap are subjected to said strain. These straps 2 are usually made of heavy woven fabric, and experience has shown that after a comparatively short use, the strain on the fabric of the strap where it is bent over the nose 8 causes the strap to wear and tends to break the threads of the fabric at this point. If the wrench is used after such wear begins to show, the strap will very soon be unfit for further service.

I have provided a construction wherein the position of the strap can be adjusted relative to the handle 1 so that different portions of the strap may be brought into position to receive the strain incident to the use of the strap. I accomplish this by providing a. construction wherein the shackle 4 may be fastened to the handle 1 in different positions. The shackle is shown as pivotally secured to the handle 1 by means of a bolt 12 which extends through eyes ,13 at the ends of the shackle and through an aperture in the handle 1. I have herein proi vided for adjusting the strap relative to the handle by making the vlatter with a plurality of apertures 11 into any one of which the bolt 12 of the shackle 4- may be secured. When the bolt 12 of the shackle is placed in lho, loft-hund holo` ll, :i lill`0i'cnl' .f:lion of the strap Q will ha snhjvr'l'd to tinl sl'rilin incidonl to passing around the noso h llnin when the slizicklofis secured in villini' (inv of the other holes ll. My invention llwi'v loro, provides n consl'rnclvinn by whiffli tlm wein and slraiin on lhl.-y strap cnn lllA llis-A ti'ilintd over :i ronsdei-:ilile lvngrtli 'lhli'lol thus inzitviizilly longthcnng lhv li'l'lA ol flu strap.

-1n Hsin;r tlnl (lviii'v lho sinn-lilo l will hv pivotullv nionnlvd in ono of tlm :merlin-w ll. find llnwrcncli will liu used nnlil llw poilion ol" llw Sli'zip Clint is liont owl' lhov noso S lllgins lo show :mino signs ol wozu'. r[ln-n thi shnvlll may lic :nljnsl'wl to :innllwr mw 0F the holes ll which will lning :1 lilsh poi'linn of thai =lrn| inyosil'ion tn liv unginlml hy lhil nose S. :ind when lhis lii'lsli portion lifgins lo show signs (if wml' tlm hiuflll muy lfw lill lilirlhoi' zidjiisl'vd.

l claim:

l'n :i strap wronch` flic combination with n handle having n pointed chunping nos@ :it one 0nd and provided wil-l1 a pLlreilit-` of ll'inisvlisl:1pm-lures sillnited zii diforont di lances from the nose, of :i shackle, moans to pivolnlly svcin'u sind shzulilv into any one nl: .Quid apertures, und il strap secured :it one und to sind shackle und adapted to he, passed around l'li noso und thon around n pipe :ind to hum The, other 0nd thereof insvrlod loef lwiwn the lirsl-nainvcl and and Suid noso. tho :nljuslincnl of thv shackle into different zinl-rtnrvs providing' for bringing dillerent porlinnnL of the, end ol l'he strap which is s0- fln-od to the shackle into position. 'lo rqcoive thv strain (lilo to bonding' Said porl'ion of l'hv #lmp over the poinlod nose.

1n testimony whereof, I huw signed ini mimo to llii specification.

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